Uninstalling Exchange 2003 from a 2010 environment.

We upgraded our exchange environment to 2010 from 2003 a few months ago. We have had the old 2003 servers shutdown for a few weeks. We are now trying to uninstall 2003 from them.  We got the front end done with no problems but we are having an issue with the backend. When I go to remove I get an error that there are still mailboxes on it and they need to be moved or deleted. There are some that I can delete but there are other Distribution groups that I need to move. I have figured out how to do a search in AD users & Computers so I can see only what is on the old server but I can't find anywhere to move them to the new server. It is not like moving a user mailbox with a local move request.


Thanks in advance.
nocalertsAsked:
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Glen KnightConnect With a Mentor Commented:
It's probably disabled mailboxes.
On the Exchange 2003 server using Exchange System Manager, expand Administrative Groups > First Administrative Group > Servers > SERVERNAME > Mailboxes

Right click Mailboxes and select Run Cleanup, once done, right click again and select refresh.

Do you see any mailboes with a red cross against them? If so right click and select purge.
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Glen KnightCommented:
They should all appear in the Exchange 2010 Management Console under Mailbox and Recipients or Distribution Groups.
Under Mailboxes they will appear as Legacy mailboxes.
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AkhaterCommented:
ldifde -d "DC=ROOT,DC=COM" -f c:\output.txt -r "(&(objectCategory=person)(objectClass=user)(msExchHomeServerName=/o=ORGANIZATION NAME/ou=ADMINISTRATIVE GROUP NAME/cn=Configuration/cn=Servers/cn=SERVER-NAME-TO-REMOVE))"

change everything in BOLD to the correct values, then open the text file and find these users in ADUC right click exchange tasks and "remove all attributes" this should fix your issue
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nocalertsAuthor Commented:
That is true for user mailboxes but not distribution groups.
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Glen KnightCommented:
Distribution groups are not homed on servers because they don't have mailboxes.
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AkhaterCommented:
Please run Get-DynamicDistributionGroup | WHERE { $_.RecipientFilterType -eq 'Legacy' } from your exchange 2007 management console
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nocalertsAuthor Commented:
Nothing showed up when I ran that.
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AkhaterCommented:
did you try running what I suggested in 35190300
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nocalertsAuthor Commented:
That seems to only be users. The issue is with distribution groups and external contacts.
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Glen KnightCommented:
As I said, distribution groups and contacts do not have a mailbox and are therefore not homed on a mailbox server.
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AkhaterCommented:
I know this is users but does it give back any result ?

if so go to ADUC and remove all settings and try again
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nocalertsAuthor Commented:
I think the issue is with some old user accounts that needed to be deleted. I have to look into an issue with a routing group and then I will try the uninstall again, and post if it works or not.
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nocalertsAuthor Commented:
you're right it wasn't distro groups it was old user mailboxes...

Thanks
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